Punching machine



Oct. 31, 1933. A. P. BLOOD PUNCHING MACHINE Filed Feb. 7, 1930 5 Sheets-Sheet 1 w B gy Oct. 31, 1933. -A. P. BLOOD PUNCHING MACHINE Filed Feb. 7, 1930 3 Sheets-Sheet 2 O E N Np, MM MM Y %B 0U Oct. 31, 1933. Q P, BLOOD 1,932,571

PUNCHING MACHINE Filed Feb. 7, 1930 3 Sheets-Sheet 5 'LNVENT R BY 4 m i 7 ATTO R QEYJ Patented Get. 31 1933 r I I o hurrah STATES serum oFFicE PUNCHING MACHINE Alexander P. Blood, New York, N. Y.

Application February 7, 1930. Serial No. 426,507 7 6 Claims. (01164-) This invention relates to punching machines the feed {of the work being correlated to sub and particularly to machines for punching to J'ect each piece of work in turn to the operation size mica and like materials. of the punch. Such an arrangement increases One object of the invention is to provide an production and reduces the possibilities of injury 5 eflicient and durable machine for punching to to the operator.

size mica and like materials. The punching mechanism comprises a recipro Another object is to provide such a machine catingpunch l and a stationary die 2. Punch 1 with means for positioning, clamping and feeds c rri at they lower end of a Punch holding ing the uncut Work to the punching mechanism. arm 3, t 1 1 d of which is pivotally 00h;

1.0 Another object is to provide such a machine nected to a connecting rod 4 eccentrically mountwith automatic means for releasing the clamping ed 0 a'd vi Shaft 80 that p IOtatiOII'Of means and removing the scrap material following Shaft 5 punch vtwill be reciprocated tOWard d a punching operation. from die 2. Shaft 5' may be journaied in the Other objects will be in part obvious and. in pp p t Of a Supporting frame 5 a d d e 2 s 15 p t p inted out hereinafter. bolted to the lower part of supporting frame 6.

The invention accordingly consists in the feasecured to and eXteIldiIlg from the 10We1 D tures of construction, combinations of elements, tion of frame 613 a Supporting member formed and arrangements of parts whi h 111 be xto extendupward and outward to provide a table emplified in the structure hereinafter described 8 to pp a W f in i l 01' conveyor 9. 3a and the scope of the application of which will AS st ShOWIl in the table 3 is p f be indicated in the sub-joined claims. a ly in he f of a circle segment ppr xi In the accompanying drawings in h h i mating 200 of the circle, the ends of the seg shown one of the various possible embodiments e t p b y terminating equal distances m of the invention; the punching mechanism to permit the dial to ,25 Fig. 1 is a side view'of a: punching machine be flexed downwardly by the punch as hereinafter 30 embodying the invention. more fully explained. I

Fig. 2 is an enlarged sectional view taken on Referring W to Bolted the pthe line 22 of Fig. 1. port 7 is a stationary stud shaft 10. Rotatably Fig. 3 is an enlarged sectional iew tak n mounted on the shaft 10 is a circular carrier 30 the line 3-3 of Fig. 2. 11 to which the dial 9' is secured by means of 35 Fig. 4 is an enlarged sectional view taken on screws 12. v I the line i-4 of Fig. 2. y The mechanism for rotating carrier 11 and dial Fig. 5 is an enlarged side view in section of 9m pr t e Wo k to h p hi m h cne of the positioning and clamping devices and f is as fOlIOWSI 35 showing a piece of ork positioned on the feed- As best shown in Fig. 3, there is bolted to the ing dial or conveyor. under side of carrier 11 a ratchet wheel 13. Be-

Fig. 6 is a setcional View taken on the line n ath the a fi Wheel 13 p Carrying arm 6-6 of Fig. 5. 14 is rotatably mounted on stud shaft 10. As Fig. 7 is a top view of two pieces of the finished S w in arm 1 Carries a p t0 40 product of the machine, engage ratchet teeth 16 of ratchet wheel 13; Arm

I Hereiofore mica and like materials have been has a p and t cb ebt o With a Slotted. cut to size by placing an uncut piece of work over arm Which is ecip at d to rotate t d al the die of a punching machine and then operat- 9 intermittently. Shown in 1, a m 7 ing a punch to out the work. In such machines i r ip b h gh a slide bar 18, a link 45 it was necessary for the operator to position 19, anosci t 20 DiVOted 0 frame separately'each uncut piece of work over the die. a link 21, and a crank arm 22 on driveshaft 5. Such positioning operations resuited in consider- The arrangement is such that the dial 9' is staable delay and often resulted in injury to the tionary during a punching operation and adoperator. l vances a step during the intervalibetween punch- 50 The present invention contemplates the posiing operations. I v tioning of a plurality of uncut pieces of work on Referring now to Fig. 2, dial 9 is provided with a feed dial or conveyor at a point relatively rerno'; e 'a plurality of openings '23 preferably equally from the punching mechanism, and'feeding the spaced circumfer'entially, over which openings work piece'bypiece to the punching mechanism; the uncut pieces of work are positioned and 55' the operations or the punching mechanism and through which the punch, operates to force the work against the cutting die when the opening is in alignment with the punch and the die. Openings 23 are preferably formed with beveled sides to prevent cracking and breaking of the work during a punching operation.

Adjacent each opening 23 a presser foot 24 is pivotally mounted on the carrier 11 and is preferably yieldingly pressed toward the dial 9 by a spring 25 to clamp the work in position over the opening.

As best shown in Fig. 5, the under side of each presser foot 2 l is provided with one or more positioning pins 25 which extend into openings 27 formed .in dial 9. Pins 26 serve to position the work relative to the opening 23 and are located a sufficient distance from the front end of t e presser foot to permit the edge of the work to be clamped and held against the dial. Thus the work is positioned and held over the opening 23 during the feeding movement to the punching mechanism and during the punching operation.

The mechanism for raising the presser foot after a punching operation to release the portion of the work held thereby is best shown in Figs. 3 and i. The presser foot is provided with an upstanding pin 28, which engages a cam 29 secured to stud shaft 10. Cam 29 depresses pin 28 causing the presser foot 24 to pivot about its pivot point and thereby raise the outer end the presser feet. When the pin 28 passes the cam 29 spring 25 will again press the presser foot into contact with the dial 9.

Located adjacent cam 29 is a revolving brush 30 for removing scrap material from the surface of dial 9. Brush 30 which contacts with the surface of dial 9 is supported by a bracket 31 secured to the frame 6 and is rotated by a pulley 32 through a belt 33 and a drive pulley 34 on drive shaft 5.

Dial 9 is preferably made of thin flexible metal so as to flex easily under the pressure of the punch and be pressed into firm contact with the upper surface of the die during a punching operation. As pointed out hereinbefore, the table 8 does not lie beneath the dial 9 adjacent the punching mechanism. The flexing of the dial 9 assists materially in reducing the tendency of the work to crack and break during punching operations. To facilitate the flexing of the dial 9 it may be made up of a plurality of segments.

Drive shaft 5 may be rotated by a drive pulley 35 through a belt connection with a source of power.

The operation of the machine is as follows:

With drive shaft 5 connected to and rotated by a source of power the punch l is reciprocated toward and from die 2, and the dial 9 is rotated intermittently, each opening 23 stopping in turn beneath the punch l. The operator places a piece of work over each opening 23 as the opening passes him, and presses the piece of work beneath the presser foot 24 and against positioning pins 26. Each piece of work is fed by the dial 9 to the punching mechanism where the punch descends, depressing the flexible dial and the work against the die and cutting the work to size. The punch. then rises and the dial moves another step to present the next piece of work to the punch. As each presser foot 24 moves from the punching mechanism its upstanding pin 28 engages cam 29 and releases the scraps of work held thereby. Revolving brush 30 removes the scraps while the presser foot is raised. When the presser foot has passed the cam 29 its spring returns the presser foot into pressing contact with the dial ready to receive, position and clamp another piece of work.

The die shown for illustration is adapted to out two pieces dimensioned as shown in Fig. 7.

It will be understood, however, that different forms of dies may be employed and that different dials may be substituted having larger or smaller openings.

It will be seen that there is provided a construction of an essentially practical nature in which the several objects of this invention are attained.

Among other advantages, the invention provides a high speed punching machine which is particularly well adapted for cutting mice, and like materials to size without cracking or creaking the same.

As many other embodiments may be made without departing from the scope of this invention it is to be understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

I claim:

1. A. machine for punching to size mica and like materials comprising, in combination, punching mechanism including a relatively movable punch and a cutting die, a flexible circular conveyor provided circumferentially with a plurality of openings having bevelled edges, means to position a piece of work over each opening, presser means adjacent each opening to clamp a piece of work thereover, means to rotate the conveyor between the relatively movable punch and die to present the work to the operation of the punching mechanism, acam operating on the presser means to raise the same after a punching operation, and a revolving brush to remove from the conveyor the pieces of work released from the presser means; the flexible conveyor being out of contact with the punch and die during rotation of the conveyor and being flexed into contact with the die during a punching operation.

2. A machine for punching to size mica and like materials comprising, in combination, punching mechanism including arelatively movable punch and a cutting die, a flexible circular conveyor provided circumferentially with a plurality of openings, presser means adjacent each opening to clamp a piece of work thereover, means to rotate the conveyor between the punch and die to present the work to the operation of the punching mechanism, means to raise the presser means after a punching operation, and means to remove from the conveyor the pieces of work released from the presser means; the flexible conveyor being out of contact with the punch and die during movement of the conveyor and beingflexed toward the die during a punching operation.

3. A machine for punching to size mica and like materials, comprising, in combination, punching mechanism including a punch and a cutting die, a flexible work-conveyor consisting of a metal plate provided with a plurality of openings, means to position a piece of work on said conveyor over an opening, and means to move the conveyor between the punch and the die to present the opening and the work to the operation of the punching mechanism; the flexible conveyor being out of contact with the punch and die during movement of the conveyor and being to present the opening and the work to the operflexed toward the die during a punching opera tion.

4. A machine for punching to size mica and like materials, comprising, in combination, punching mechanism including a punch and a cutting die, a flexible work conveyor consisting of a metal plate provided with an opening, means to position and clamp a piece of work on said conveyor over said opening, and means to move the conveyor between the punch and the die ation of the punching mechanism; the flexible conveyor being out of contact with the punch and die during movement, of the conveyor and being flexed toward the die during a punchingoperation.

a plurality of segments each mounted to be flexed by the punch toward the die during a punching operation. 6. A machine for punching to size mica and like materials comprising, in combination, punching mechanism including a punch and a cutting die, a conveyor consisting of a segmental plate provided with a plurality of spaced openings, presser means adjacent each opening to clamp a piece of work thereover, and means to advance the conveyor between the punch and die to present the work to the operation of the punching mechanism; said conveyor comprising a plurality of segments each mounted to be flexed by the punch toward the die during a punching operation.

ALEXANDER P. BLOOD. 

